After Berendzen & Dimmick, 2002 [fig. 3]

<==o Pleuronectiformes [Heterosomata] (flounders; kampelakalat)
   |--o Psettodidae [Psettodoidei] (alkukampelat)
   |  |-- †Joleaudichthys M. Eoc. NAf. 
   |  `--o Psettodes
   |     |-- P. belcheri Bennett, 1831 (Spottail spiny turbot)
   |     |-- P. bennetti Steindachner, 1870 (Spiny turbot)
   |     `-- P. erumei (Bloch & Schneider, 1801) (Indian spiny turbot)
   `--o Pleuronectoidei (uuskampelat)
      |--o “Bothoidea”
      |  |-- Paralichthyidae 1 [Cyclopsetta -group] (Large-tooth flounders) [N: 16/85] [FB: 14/102] [paraphyletic]
      |  `-- Bothidae () [20/115]
      `--+-- Scophthalmidae (silokampelat) []
         |--+-- Poecilopsettidae [Pleuronectidae: Poecilopsettinae] ()? [N: 3/14] [FB: 3/13]
         |  |-- Soleidae (kielikampelat) [Nelson: 20/89] [Fishbase: 27/106]
         |  |-- Cynoglossidae (etelänkielikampelat)
         |  |-- Samaridae ()? [N: 3/20] [FB: 3/17]
         |  `--+?- Citharidae (isosilmäkampelat) [FB: 4/6] [paraphyletic]
         |     `-- Achiridae (amerikankielikampelat; American soles) [FB: 9/31]
         `--+-- Paralichthyidae 2 (Large-tooth flounders) [N: 16/85] [FB: 14/102] [paraphyletic]
            `-- Pleuronectidae (righteye flounders; oikeasilmäkampelat) [FB: 35/90] [paraphyletic]

Not recognized by Berendzen & Dimmick, 2002:

    Achiropsettidae (southern flounders) [3/5]

Reference(s):